Troga is specific to southern Sardinia, Teulada in Cagliari and Villaperuccio in the Iglesiente, should derive from a nickname based on the Sardinian term Troga (Prestesto, excuse) additions provided by Giuseppe Concas Troga: Rare surname, widespread Almost exclusively in the lower Sulcis. Troga comes from Trogais, Trogai in the meaning of twisting, wrapping something with a thread or with a rope or other. From the Latin root Torq/C, as Torquere. You can make the etymological combination with the surname Trogu, but it does not have the same semantic value. The Sardinian expression: Abarrai Trogamidha, Troga, has the meaning of becoming more and more an issue.
You may be interested
Verba Volant, Scripta Manent